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Open AccessArticle

An Experimental Study of Two-Phase Pulse Flushing Technology in Water Distribution Systems

1
School of Computing and Digital Technologies, Staffordshire University, Stoke on Trent ST4 2DE, UK
2
School of Engineering and the Built Environment, Birmingham City University, Birmingham B4 7XG, UK
3
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
*
Author to whom correspondence should be addressed.
Water 2017, 9(12), 927; https://doi.org/10.3390/w9120927
Received: 17 October 2017 / Revised: 20 November 2017 / Accepted: 21 November 2017 / Published: 5 December 2017
The deterioration of drinking water during distribution process is caused by many factors. The microorganisms and substances peeling off from the “growth-ring” make the secondary pollution in drinking water distribution systems. To reduce the secondary pollution, two-phase pulse flushing technology is introduced to quickly remove the “growth-ring”. In this study, experiment is undertaken for investigating the efficiency of the two-phase pulse flushing and finding the best setting combination. A case study is undertaken to compare the efficiencies between the two-phase pulse and the single-phase flushing. The best setting combination of the two-phase pulse flushing is at the frequency 4 s–6 s (air inflow time is 4 s and air cut off time is 6 s) and the round air inflow nozzle is set at the bottom of the pipe. Two-phase pulse flushing technology can save 95% of water and 6 h 40 min flushing time. View Full-Text
Keywords: water distribution system; secondary pollution; growth-ring; flushing water distribution system; secondary pollution; growth-ring; flushing
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Tang, Z.; Wu, W.; Han, X.; Zhao, M. An Experimental Study of Two-Phase Pulse Flushing Technology in Water Distribution Systems. Water 2017, 9, 927.

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